Rotatory perforating device.



R. GOMPF.

ROTATORY PERFORf-,TNG DEVI-CE. APPLICATION man SEPT.2.1913.

l ,l 89,993 Patented Jupe 27, 1916.

Y gles RUDOLF GOMPF, OF BERLIN, GERMANY.

ROTATORY PERFOBATING DEVICE.

' Specification of Letters Patent. Patented June 27, 1916,l

Application led September 2, 1913. Serial No. 787,726.

To all whom it may concern Be it known that I, RUDOLF GOMPF, a subjectof the Emperor of Germany, and Aresident of 27 Elisabethstrasse, Berlin,Germany, have invented new and useful Improvements in RotatoryPerforating Devices, of which the following is a specication.

rlhis invention relates to a device for providing a continuous length ofpaper or fabric, or, it may be2 a single sheet of paper or strip offabric with continuous or intermittent perforations of circular or otherform, the arrangement being such that the band of steel or othersuitable metal which contains the matrices can be caused to lie againsta shorter or longer portion of the periphery of the annular drum whichcarries the punches, and while in this position to perforate thel rollof paper or the single sheet passing between the band and the drum, thisbeing effected by mechanically forcing the punches. out of the annulardrum and causing them to pass into the matrices. This arrangementinsures that the punches enter into the matrices in a directionabsolutely at right anto them, this being an essential condi- A tion foreffecting satisfactory perforation,

the punches being moreover able again to pass to the rear of theperiphery of the drum carrying thembefore reaching the point at whichthe band carrying the matrices ceases to be in contact with theperiphery-of the drum.

A device iii accordance with the invention is illustrate in theaccompanying drawings in whic Figure 1 shows rangement of the punch drumand of the matrix band with aroll of paper passing'between them, Fig. 2shows, partly in section, the arrangement of the punches or punchpinswith the mechanism for actuating them in one direction with the matrixband lying against them, Fig. 3 shows on an enlarged scale a sectionthrough a portion of the matrix band, Fig. 4 shows in plan,thearra-ngement of Fig. 1, the upper portion of the matrix band beingcut away to the right and left.

The essential parts of a perforatng device in accordance with thisinvention are the annular drum 2 which contains the punches 1 and theendless steel band 3, in which the matrices 4 are stamped: The length ofthe matrix band may vary, it howdiagrammatically one arever will be bestfor the satisfactory operation ofthe/device that the band should be ofthe exact length of the external periphery of the drum, as in this caseduring each revolution of the device the punches will always enter intothe same matrices, as during the preceding revolution. The endless steelband 3 passes over the rollers 5 and 6 which are so arranged in relationto the annular drum that a portion of the steel band 3 is caused to lieon the periphery of the drum 2. The rotary' movement of the shaft 7 ofthe drum 2 is transmitted through the toothed wheel gear, 8, 9, 10 and11 to the shaft 12 of the roller 6, the steel band 3 being thus causedto rotate at exactly the same peripheral speed as the disk 2. Experiencehas shown that during the forward movement of the steel band,l onaccount of the friction between it and the surfaces of the rollers 5 and6 by which it is tightened, the matrices 4 are apt to become displacedin relation to the punches 1, while moreover, when there is any tendencytoward such displacement, it may occur that the punches 1 which havepassed into the matrices 4 may press in the direction of movementagainst the ywalls of the matrices, and thus gradually extend them, andto obviate this, there are inserted in the roller 6 rigid pins 13 whichengage with apertures 14 arranged at intervals in the steel band topositively guide said band and thus assure the entry of the punches intothe matrices.

Fig. 2 illustrates in section one of the `many possible arrangements ofthe punches 1, with the annular drum 2 and the mechanism for moving themforward. Tcprevent the Ydrawing from becoming obscure, the punches areshow-n arranged at comparatively large intervals, and it is has been asvsumed that circular perforations are to be produced. The circular pins 1are each provided in the usual manner-With a tapered band and are pushedin pairs into flat plates 15. The front part is guided in the apertures16 of the annular drum 2, the distance between these Yapertures asalready stated, accurately corresponding with the intervals between the'matrices 4. `The plates 15 together with the pins 1 are caused by theaction of the springs 17 to b'earagainst the sliding jaws 18, which areattached to the side of the annular drum 2in such manner that they canbe displaced in the slots 19 in an exactly radial direction from thecenter of the shaft 7 toward the periphery of the annular drum. In theconstruction shown in the drawings this is effected by means of theroller 2O mounted on the arm 21 attached to any suitable point outsidethe plane of the annular drum2 and the path of the paper or fabric.

The operation of the device is as follows: When in position 1 thesliding jaw' 18 is by the action of the springs 17 pressed against thescrews 23 in the "direction of the center of the axis, so that the pins1 will not project beyond the periphery of the annular drum 2. Duringthe continued rotation of the drum the jaw 18 comesinto position II uponthe roller 20 and by the compression of the springs 17 is pushed towardthe periphery of the drum 2 with the result that the pins 1 will nowproject beyond the periphery exactly opposite to them, by which meansthe roll of paper or l' fabric passing between the drum 2 and the steelband 3 is perforated in an absolutely perpendicular direction. Duringfurther rotation intoposition III, the sliding jaws 18 after ceasing tobe in contact with the roller 20 again assumes its initial position,that is to say the pins are again with-drawn within the perpher of theannular drum 2. The entrance o the pins 1 into the matrices 4 isconsequently eected at a point at which the band 3 fits closely againstthe curvature of the disk 2. This operation is repeated withoutinterruption in the case of all the succeeding groups of pins, with theresult that the roll of vpaper `and fabric is perforated in onecontinuous operation. As when the pins 1 penetrate Ainto the roll ofpaper or fabric there is produced a certain amount of stress which mightpossibly be transmitted to the steel band there is provided above thisband a thrust-bearing roller 23 (Fig. 1) which bears slightly against itand in which there is formed a groove 24 (Fig. 4) to facilitate the freepassage of the projecting pins 1.

Having now described the nature of my invention what I claim is:

1. In a perforating device of the class specified, the combination of arotary annular punch drum 4having peripheral perforations and aplurality of spring-actuated slides carrying groups of punches movablethrough the periphery of the drum, an endless matrix band rotating withthe said drum and having apertures to register with the said punches,and means consecutively engaged by the .slides to projectthe grou s ofpunches throu h the periphery of the rum.

2. In a pe orating device of they class specified, the combination of arotary annular punch drum having openings in the periphery thereof andprovided with groups of punc es radially movable through the saidopenings, an endless matrix band r0- tating with the drum and havingapertures to register with the punches, and means engaged by theconsecutive groups of punches during the rotation of the drum to projectsaid punch groups through the openings of the drum and into theapertures of the matrix band.

3. In a perforating device of the class specified, the combination of arotary annular punch drum having distinct groups of spring-actuatedpunches disposed near the periphery of the drum, the groups of punchesbeing movable through the drum periphery, an endless matrix handengaging the drum and having apertures to register with the groups ofpunches, means for driving the matrix band to rotate the same at exactlythe same peripheral speed as the annular drum, and means forconsecutively actuating the groups of punches to project them throughthe periphery of the drum, the groups of punches being automaticallyreturned to their normal position after disengagement from the saidlatter means.

4. In a perforating device of the class specied, the combination of arotary annular drum having peripheral openings, independently operatingslides each carrying a group of punches, the said slides being radiallydisposed within the circumference of the drum and provided with springsfor returning the same to normal position and also with means to limitthe outward radial movement thereof and of the punches, an endlessrotating matrix band having a portion thereofmaintained in contact withthe periphery of the drum and provided with apertures for registrationwith the groups of punches, and means for consecutively engaging theslides and projecting the groups of punches through the periphery of thedrum into the portion of the matrix band in contact with the drum.

In witness whereof I have hereunto set my hand in the presence of twowitnesses. RUDOLF GOMPF.

Witnesses:

WOLDEMAR HAUPT, HARRY L. WnsoN.

